Research/Sitter/MAGNDATA / 1.132_Mn2As.mcif

Mn₂As

MAGNDATA entry 1.132 · source

antiferromagnet

No net magnetisation, and up and down sublattices are related by a shift or by inversion, so the bands stay spin-degenerate: a conventional antiferromagnet.

Spin group ¹4/¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 573 K (300 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P_a n m a BNS 62.450
Point group	mmm1′
Parent space group	P 4/n m m No. 129
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 1/2] 1k
Cell	a 3.78 · b 3.78 · c 12.56 Å · α 90° · β 90° · γ 90°
Transition	573 K (300 °C)
Measured at	290 K
Magnetic ions	Mn
Largest moment component	3.7 μ_B
Method	NPD

Symmetry

Stereogram of the magnetic point group: each operation applied to one direction. Filled = upper hemisphere, ring = lower; red operations include time reversal. Lines are mirrors; polygons are 2/3/4/6-fold axes; the centre ring is inversion.

Every structure in P_a n m a →

Atom sites · 3 sites · CSV

site	element	x	z	m_a	m_b	m_c	\|m\| (μ_B)
Mn1	Mn	0	0	0	3.7	0	3.7
Mn2	Mn	0.5	0.335	0	3.5	0	3.5
As1	As	0.5	0.1325

Moment components are along the crystal axes a, b, c (μ_B), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

A.E. Austin et al. Journal of Applied Physics (1962) · doi:10.1063/1.1728729

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.132_Mn2As.mcif from MAGNDATA · entry page

sha256 of this copy: 2bf0f23512b669f128ed41f488a2caad8a233aa80cdd7575a40f9dd152ff2762
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.132_Mn2As.mcif.